Conclusions of some studies on the effectiveness of the radiophonic schools of accion cultural popular Brumberg, Stephen F. creator [et al.] (autor) text dictionary ^^^ 1972 monographic eng [pág. varía] Acción Cultural Popular XX Escuela radiofónica Medios de comunicación Radio educativa Colombia 371.3331 BRUc (Working document ; no. 20) Acervo ITESO - Biblioteca 050901 20250521000000.0 000483723